Electric vibrator.



PATENTED MAR, 22; 1904.

W. MACMILLAN- ELEUI'RIG VIBRATOR. APPLICATION FILED JULY 29, 1902.

N0 MODEL.

2 SHEETS-SHEET 1.

No. 755,577. PATBNTED MAR. 22,1904.

W. MAGMILLAN- ELECTRIC VIBRATOR.

APPLICATION FILED JULY 29, 1902.

N0 MODEL. 2 SHEETS-SHEET 2.

WITNESSES: INVENTOR W MZQM m ATTORNE UNITED STATES Patented March 22, 1904.

PATENT FFICE.

WILLIAM MACMILLAN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO EGBERT VVINKLER, OF NEW YORK, N. Y.

ELECTRIC \IIBRATOR.

SPECIFICATION forming part of Letters Patent No. 755,577, dated March 22, 1904.

Application filed July 29, 1902.

T aZZ whom it may concern:

Be it known that 1, WILLIAM MACMILLAN, a subject of the King of Great Britain, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Electric Vibrators, of which the following is a specification.

My invention relates to electric vibrators, which may be used in connection with an electric bell, electric sculpturing, chiseling, or riveting instrument; and it has for its object to provide a means for electromagnetically causing a device or tool to move back and forth.

The invention consists in providing a reciprocating means and an electromagnetic means for operating the reciprocating means in opposite directions.

It also consists in providing a means for directing the current into, first, an electromagnetic means for causing the armature to move in one direction and then directing the current through another electromagnetic means to cause the armature to move in the opposite direction.

The invention also consists in providing a simple switch which is inclosed and carefully protected from the weather or the atmosphere.

The invention also consists in other features of construction and the combination of parts hereinafter described and claimed.

The invention in illustrated in the accompanying drawings, in which- Figure 1 is a top View of my invention as applied to an electric bell. Fig. 2 is a sectional view of my device, taken on the lines 2 2, illustrating the armature of the electromagnet. Fig. 3 illustrates the switch as located in an inclosure located on the back of the frame of the electric valve. Fig. 4 illustrates the invention as applied to a modified form of an electric bell. Fig. 5 is a diagram illustrating the circuit connections of the electromagnetic operating means.

Referring to Fig. 1, 1 indicates the frame of the electric bell, and 2 3 indicate the electromagnetic means for operating the bell. tindicates the armature. 5 indicates the hammer, and 6 indicates the bell proper. The

Serial No. 117,457. (No model.)

electromagnets 2 3 are supported upon the frame 1 by the right-angle pieces 7 8 9 10, which are fastened to the electromagnets 2 3 and to the frame 1 by screws. The electromagnet 2 is provided with poles 11 121, and the electromagnet 3 is provided with poles 13 14. The poles of one magnet are located on the opposite side of the armature & from the poles of the other magnet. The armature 4. is pivoted to the frame by the screw 15 and carries at the opposite end the clapper 5. The hammer 5 is adapted to operate upon the hell 6, which is attached on a supporting-pin by the screw 16.

A means may be provided for directing the current first through one electromagnet and then through the other. This means consists of a switch located in an inclosure 29 on the back of the frame 1. The switch consists of a pair of contacts and 21, fastened by screws 22 and 23, which are insulated from the frame. The contacts are provided with contact-faces 24 and 25, which are adapted to press upon a moving contact 26 as it slides back and forth. The moving contact 26 has located upon each side insulating-strips 27 28, which move with the contact 26 and are positioned below the contacts 24 25. The circuit is thus alternately broken between the moving contacts and the stationary contacts 24 25. The contact 26, with its insulatingstrips, is fitted loosely in the inclosure 29 and is freely moved back and forth. The contact 26 makes a sliding contact first with the contact and then with the contact 24. as it is moved back and forth. As contact 26 slides under contacts 24 and 25 there is constant pressure between the contacts, and the resistance offered to the movement of the armature is very small and at the same time it is constant. The inclosure is closed by means of the cover 30, which is secured by screws. The moving contact of the switch is operated by the armature. In order to do this, the armature is provided with an arm 31, which extends downward and through a slot 32, located in the frame 1. The arm also extends through a hole 33, located in the movsource of current.

ing contact 26. The moving contact 26 is held against the frame 1 by the elasticity of the contact-springs 2O 21. For closing the slot 32 a shutter 34 is provided, which securely fits over the arm 31. The shutter 34 is made of insulating material and is located within the contact-inclosure 29. As the armature4 carries the arm 31 back and forth it completely closes the slot 32 and prevents any atmospheric action upon the contacts contained in the inclosure 29.

The circuit connections of my invention are illustrated in Fig. 5. 40 and 41 indicate binding posts which may be connected to any source of electric current. Binding-post 40 is connected to the two electromagnets 2 3. One of the terminals of the electromagnet 2 is connected to the contact 21. One ofthe terminals of the electromagnet 3 is connected to the other contact 20. Binding-post 41 is directly connected to the frame 1, the frame thus constituting a part of the electric circuit. The electric circuit is completed from the frame to the contact 26, which as it moves back and forth alternately closes the electric circuit through the contacts and 21. When the contact 26 is in contact with the contact-surface of contact 21, the electric current will pass from the electric source to the binding-post and through the coils of the electromagnet 2 to the contact 21 to the contact 26. The current then passes from the contact 26 to the armature 4 and through its pivot 15 to the frame 1, and returns by the binding-post 41 to the source. This completes the circuit and energizes the electromagnet 2, which draws the armature 4 to its poles 11 and 12. As the armature 4 moves toward the electromagnet 2 it slides the contact 26, so as to make con tact with the contact 20, and breaks the circuit between contact 26 and contact 21. This contact 20 is connected with the electromagnet 3 and the circuit is then closed from the source of current through the binding-post 40, the electromagnet 2, and contact 20 and contact 26 back by way of the armature 4, the pivot 15, the frame 1, the binding-post 41 to the This in turn energizes the electromagnet 3, and the armature 4 is drawn over by the magnetic force produced in the poles 13 and 14 of the electromagnet 3, when again the contact 26 is brought in contact with contact 21 and the electromagnet 2 is again energized. The armature is thus caused to vibrate back and forth between the poles of the electromagnets 2 and 3.

It will be seen by the above description, that the armature does not depend upon any spring for its operation, but the electromagnet means positively draw the reciprocating means back and forth. This does away with all adjusting parts and obviates all the objectionable features found in the use of springs in bells now known in the art and in many other devices. Furthermore, the bell can be located in any position, and it does not require any balancing effect between the weight of the clapper and a spring that may be used in operating the bell.

In the modified form of the bell, which is shown in Fig. 4, a reciprocating hammer is shown. The hammer may be supported and guided in posts 44 and 45. The posts 44 and 45 are supported upon the frame 1 of the electric bell. The armature has a second rod 46, extending upward and moving in a transverse slot or hole 47 located in the reciprocating hammer 48. 1 As the armature moves back and forth by the operation of the electromagnets it causes the hammer 48 to reciprocate back and forth. The hammer 48 and the coils of the electromagnet may be completely covered by a turtle-bell 49, which may be supported by the post'5l and screw 50. The post 51 is attached to the frame 1 by the screw 52. The moving parts of the electric bell are thus completely covered by the gong 49. The circuit connections of the bell (shown in Fig. 4) are the same as those of the bell shown in Fig. 1.

Another feature of my invention consists in the improved means of connecting the binding-posts to connecting-wires of the electromagnet. tric connecting-wire and a binding-post which is supported in insulating material is made, the expanding and contracting of the metal and insulating portions in difierent degrees compresses the insulation or stretches the insulation so that its permanent shape is materially and permanently altered, due to changes of temperature. This leaves the contact between the connecting-Wire and the bindingpost very loose. This is true whether the connecting-wire is located within the insulating-tube which surrounds the binding-post or whether the end of the connecting-wire is located between the collar of the insulator and the metallic washer placed or screwed upon the stud of the binding-post. By my new and improved form of a connector the loose contact between the wire and the binding-post is entirely done away with.

In Fig. 2 is illustrated a cross-section of the binding-post 40. The binding-post 40 has a screw-threaded stud 50, which is inserted in an insulating-tube. The stud is provided at one end with a slot or split portion 54, which extends to substantially one-half the length of the stud. Before the stud is placed in the hole 51 a wire is inserted in the stud and a washer is forced down around the split portion of the stud. The split portions are thus compressed around the wire 56. The tube is warmed and is then placed in the hole 51 of the frame, and by means of a press the ends of the tube are compressed to form flanges or collars 52 and 53 about the screw-threaded stud 50. This compresses the insulating-tube into the threads of the stud and secures the When a connection between an elecstud in the frame 1. The binding-post L0 is then screwed upon the stud 50. This form of connector absolutely secures the Wire, and the connection is not in any Way affected by. the change in temperature or the contraction of the insulating material.

By the above specification Ihave described and illustrated only the preferable form of my invention. The invention may be applied to many forms of devices Without in any Way departing from the spirit thereof.

What I claim, and desire to secure by Letters Patent, is as follows:

1. In an electric vibrator the combination of an armature, electromagnetic means located on each side of the said armature, an inclosure, a pair of contacts located Within the said inclosure, and a contact connected to the said armature also located Within the said inclosure.

2. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure, a pair of contacts located Within the said inclosure, a third contact connected to the said armature and adapted to make sliding contact with the first-named contact.

3. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure, a pair of contacts located Within the said inclosure, a third contact operated by the said armature and guided by the Walls of the said inclosure.

4. In an electric vibrator the combination of electromagnetic means, an armature operated by the said electromagnetic means, a contactinclosure, a pair of contacts located Within the said inclosure, a third contact adapted to be moved longitudinally in the said inclosure and to make sliding contact With the firstnamed contacts.

5. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure, a pair of contacts located at each end of the said inclosure, a sliding contact adapted to make contact With each of the first-named contacts and mechanically connected to the said armature.

6. In an electric vibrator the combination of an electric circuit and electromagnetic means connected in the said circuit, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure, a sliding contact guided by the Walls of the said inclosure and adapted to make and break the said circuit; Within the said inclosure.

7. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure, a contact located at each end of the said contact-inclosure, a sliding contact guided by the Walls of the said &

inclosure and adapted to make sliding consaid slot, a shutter adapted to be operated by v the said mechanical means for keeping the said slot closed, a contact adapted to make sliding contact With the first-named contact.

9. In an electric vibrator the combination of an electromagnetic means, an armature operated by the said electromagnetic means, a contact-inclosure having a slot, a sliding contact connected to the said armature, a shutter adapted to close the said slot and guided by the sides of the said inclosure, a contact ad apted to make sliding contact with the first-named contact.

10. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contact-inclosure having a slot, a sliding contact mechanically connected to the said armature, a shutter movable With the said sliding contact to keep the said slot closed, a contact located at each end of the said inclosure and adapted to make sliding contact With the first-named contact.

11. In an electric vibrator the combination of electromagnetic means, an armature operated by the said electromagnetic means, a contact-inclosure having a slot, a sliding contact located Within the said inclosure and mechanically connected to the said armature, a shutter also located Within the said inclosure and connected to the said armature and adapted to keep the said slot closed, a pair of spring-contacts located Within the said inclosure and adapted to make sliding contact With the firstnamed contact.

12. In an electric vibrator the combination of electromagnetic means, an armature adapted to be operated by the said electromagnetic means, a contactinclosure having a slot, a sliding contact and a shutter guided by the sides of the said inclosure, the said shutter adapted to keep the said slot closed, a pair of spring-contacts adapted to press the said sliding contact and the said shutter against one of the Walls of the said inclosure.

13. In an electric vibrator the combination of an armature, an electromagnet located on each side of the said armature, each magnet having a pair of poles adapted to operate upon the said armature, an inclosure, a pair of contacts Within the said inclosure, a contact mechanically connected to the said armature and located Within the said inclosure.

14. In an electric vibrator the combination of a pair of electromagnets, each magnet having a pair of poles, an armature located between the said magnets and adapted to be operated upon by the poles of each of said magnets, a contact inclosure having a slot, a sliding contact mechanically connected to the said armature through the said slot, the said sliding contact being guided by the sides of the said inclosure, a shutter adapted to keep the said slot closed during the movements of the said contact, a pair of spring-contacts adapted to press upon the said sliding contact and to make and break contact therewith.

15. In an electric vibrator the combination of electromagnetic means, an armature operated by the said electromagnetic means, a contact-inclosure having a slot, a shutter and a sliding contact located Within the said contactinclosure and connected to the said armature and guided by the sides of the said inclosure, an insulating-strip carried at each end of the said sliding contact, a pair of spring-contacts located Within the said inclosure and adapted to press the said sliding contact and the said shutter against one of the Walls of the said inclosure and to alternately make contact With the said sliding contact as it is moved.

16. In an electric vibrator the combination oi electromagnetlc means, an armature actuated by the said electromagnetic means, a supporting-frame having a slot, an arm located on the said armature and passing through the said slot to the opposite side of the said frame, a shutter carried by the said arm for keeping the said slot closed, a contact also carried by the said arm, and a pair of contacts, one located on each side of the first-named contact.

17 In an electric vibrator the combination of a pair of electromagnets, an armature actuated by the said electromagnets, a supportingi'rame having a slot and an inclosure, an arm carried by the said armature, a shutter supported on the said arm for closing the said slot, a contact also carried by the said arm located Within the said inclosure, a pair of contacts, one located on each side of the first-named contact and connected With the said electromagnets, all of said contacts located in said inclosure.

In testimony whereof I have signed my name to this specification in'the presence of two subscribing Witnesses.

WILLIAM MACMILLAN.

Witnesses:

JOHN O. GEMPLER, SIDNEY MANN. 

